webgpu: Implement device lost (#32354)

* device lost promise should be init at creation of device object

* device lost impl

* lock for device poll

workaround for wgpu deadlocks

* expect

* Less lost reason reasoning in script

1 files changed, 12 insertions, 3 deletions

diff --git a/components/webgpu/script_messages.rs b/components/webgpu/script_messages.rs
index 7142641a466..083f813901e 100644
--- a/components/webgpu/script_messages.rs
+++ b/components/webgpu/script_messages.rs
@@ -15,6 +15,13 @@ use crate::wgc::id::{
     ShaderModuleId, StagingBufferId, SurfaceId, TextureId, TextureViewId,
 };
 
+/// <https://gpuweb.github.io/gpuweb/#enumdef-gpudevicelostreason>
+#[derive(Clone, Copy, Debug, Deserialize, Serialize)]
+pub enum DeviceLostReason {
+    Unknown,
+    Destroyed,
+}
+
 #[derive(Clone, Debug, Deserialize, Serialize)]
 pub enum WebGPUMsg {
     FreeAdapter(AdapterId),
@@ -34,14 +41,16 @@ pub enum WebGPUMsg {
     FreeRenderBundle(RenderBundleId),
     FreeStagingBuffer(StagingBufferId),
     FreeQuerySet(QuerySetId),
-    CleanDevice {
+    UncapturedError {
         device: WebGPUDevice,
         pipeline_id: PipelineId,
+        error: Error,
     },
-    UncapturedError {
+    DeviceLost {
         device: WebGPUDevice,
         pipeline_id: PipelineId,
-        error: Error,
+        reason: DeviceLostReason,
+        msg: String,
     },
     Exit,
 }